Inkjet printing using water-based pigment ink has been carried out with laser exposure to dry the ink in a short period of time (approximately the same as the penetration time). Heating by near-infrared laser exposure is advantageous because it heats only the ink without heating the paper. As a result, the formation of cockles or creases in the paper is suppressed, and the optical density of printed images is improved. In addition, show-through to the back side of the paper is reduced, and bleeding is also suppressed. Furthermore, it is demonstrated that the favorable conditions for laser exposure are different on different types of paper because of the different penetration times; the mechanisms of the penetration and the drying are also discussed.